/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.stunner.client.widgets.menu.dev.impl;

import java.util.Collection;

import org.kie.workbench.common.stunner.core.client.api.SessionManager;
import org.kie.workbench.common.stunner.core.graph.Edge;
import org.kie.workbench.common.stunner.core.graph.Element;
import org.kie.workbench.common.stunner.core.graph.Node;
import org.kie.workbench.common.stunner.core.graph.content.view.View;

public abstract class AbstractSelectedNodeDevCommand
        extends AbstractSelectionDevCommand {

    protected AbstractSelectedNodeDevCommand(final SessionManager sessionManager) {
        super(sessionManager);
    }

    protected abstract void execute(Node<? extends View<?>, Edge> node);

    @Override
    protected void execute(final Collection<Element<? extends View<?>>> items) {
        if (1 == items.size()) {
            final Element<? extends View<?>> e = items.iterator().next();
            if (null != e.asNode()) {
                execute(e.asNode());
            }
        }
    }
}
